News / Gallery / Publications / Links / Contact

Peatlands / CLIMPEAT Project / Work Packages / Partners / Advisory board / People

Joint research project
Experimental site
Aim of the project
Hypotheses
Innovative character
Summary

CLIMPEAT: AIM OF THE PROJECT

We will use Sphagnum peatlands as a model and analyze their vulnerability in a context of climate change applying an experimental set-up according to the standard ITEX (International Tundra Experiment) protocol that simulates in situ an increase of average temperature. The underlying idea is to determine to what extent climate warming in combination with drought can modify peatland functioning along an oceanic-continental climate gradient, and in particular how this can deteriorate the C sink function. More precisely, the project aims at evaluating the effects of a moderate temperature increase in combination with drought on (1) the balance of C fluxes above- and belowground (especially via respired CO2), (2) the biodiversity and microbial activities on sphagnum and in the peat, (3) the structure of plant communities and primary production, and (4) dynamics of labile and recalcitrant organic matter (OM) of the peat substrate. Indeed, any modification of the competitive ability between vascular plants and Sphagnum mosses, and between microbes and plants for N and P acquisition will necessarily affect plant productivity and then the quality and the quantity of litter that will ultimately feed the SOC. By means of rhizodeposition, plants are expected to influence microbial abundance and activity which will be then reflected in soil enzymatic activity, peat and water chemistry and nutrient cycling.

The final objective is the creation of a biogeochemical model of C that includes interactions between these compartments.

Simultaneously, the study of the most useful biological and geochemical compartments will lead to better identification and calibration of markers of temperature-drought-induced changes (e.g. testate amoebae community structure, isotopic composition of organic compounds). The patterns of the newly identified proxies throughout the peat records will be used to reconstruct climate changes during the last 2000 years. Also, this will allow to test whether the 2000 years of peat accumulation is related to contemporary C flux dynamics.

CLIMPEAT Project

Joint research project
Experimental site

Aim of the project

Hypotheses

Innovative character

Summary

 

Work Packages

Experimental setting and environmental monitoring
Vegetation monitoring, plant standing biomass, net primary production and total nutrient content in plants

Microbial biomass and microbial diversity

Soil enzymatic activities

Micrometeorology, carbon accumulation, soil respiration and litter decomposition

Microcosm experiment (Neuchâtel)

Drought palaeohydrology and carbon accumulation during the last 1000 years

Website

Peatlands
Partners
Advisory board
People
News
Gallery
Publications
Links
Contact

^ TOP

CLIMPEAT - PEATLANDS/CLIMATE/CARBON/HUMAN

Advertising Agency QA